--  @testpoint:opengauss关键字full(保留)，作为函数名

--关键字不带引号-成功
create function full(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--清理环境
drop function full;

--关键字带双引号-成功
create function "full"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--清理环境
drop function "full";

--关键字带单引号-合理报错
create function 'full'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `full`;
create function `full`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/